﻿<html>
<head>
<title>并集</title>
<style type="text/css">
  h1,h2,h3,h4,h5,h6,p{ 
   margin:0;
   padding:0'
   height:20px;
   line-height:20p;
   font-size:20px;
   color:#00f;
   font-weight:bold;
   }
</style>
</head>
<body>
<h1>66</h1>
<h2>66</h2>
<h3>66</h3>
<h4>66</h4>
<h5>66</h5>
<h6>66</h6>
<p>这是P多多的锻炼</p>
</body>
</html>